Publishers that want to run Google AdSense native in-feed ads on their sites can now opt to have Google’s machine learning take control of the creative look and feel of those units.
Native In-feed ads are meant to have the look and feel of the rest of the content in a feed. Now, when creating an in-feed ad unit, publishers can select “Let Google suggest a style” and enter a URL with a feed on it. Then they can select an element from the feed — font, color, styles — for the ad unit to match.
This is a new option. The manual functionality is still available for those who want more control over their ad units.